69 lines
2 KiB
C
69 lines
2 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2011 Andrew Ryabinin
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "system.h"
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#include "button.h"
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#include "adc.h"
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void button_init_device(void) {
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/* setup button gpio as input */
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GPIO_PCCON &= ~(POWEROFF_BUTTON);
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}
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int button_read_device(void) {
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int adc_val = adc_read(ADC_BUTTONS);
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int button = 0;
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if (adc_val < 480) { /* middle */
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if (adc_val < 200) { /* 200 - 0 */
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if (adc_val < 30) {
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button = BUTTON_UP;
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} else {
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button = BUTTON_RIGHT; /* 30 - 200 */
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}
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} else { /* 200 - 480 */
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if (adc_val < 370) {
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button = BUTTON_SELECT;
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} else {
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button = BUTTON_DOWN;
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}
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}
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} else { /* > 480 */
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if (adc_val < 690) { /* 480 - 690 */
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if (adc_val < 580) {
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button = BUTTON_LEFT;
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} else {
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button = BUTTON_NEXT;
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}
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} else { /* > 680 */
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if (adc_val < 840) {
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button = BUTTON_PREV;
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} else {
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if (adc_val < 920) {
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button = BUTTON_PLAY;
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}
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}
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}
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}
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return button | (GPIO_PCDR & POWEROFF_BUTTON);
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}
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